IVIG therapy in IV immunoglobulin therapy. It is normally given once a month with IV predisone. It can reverse some of the neuropathy symptoms but not all. The IVIG therapy builds up your immunity. I took it as a child. There is a research study by Boston Hospital about two groups of people. One did IVIG and prednisone therapy the other medical marijuana. If you took anatomy and physiology in college nerves can not regenerate. In this study for over a year medical marijuana was proven to do some nerve regeneration and also helped with foot pain. It is an interesting research study.

I have an immunologist that is considering it. My understanding is they use donated plasma or something through an IV infusion to help support a deficient immune system. He’s seeing me for asthma. Discovered abnormalities in my bloodwork.
These neurologists may be trying the most recent suggestions for treatment of PN.
I think the infusion is supposed to help with inflammation.
I’m still researching.